A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5990-00-705-4350
NSN 5975-01-437-2518
NSN 6240-01-262-0149
NSN 5990-01-369-3380
NSN 6620-01-138-0089
NSN 5965-00-905-5197
NSN 5960-00-562-1939
NSN 6145-00-286-9588
NSN 5905-01-528-7879
NSN 5950-01-235-6702
NSN 5965-01-271-0808
NSN 6610-00-237-4667